Of note: The second of 15 events in 2015 for the Whelen Modified Tour. … The season started April 12 with the Icebreaker 150 at Thompson, won by reigning series champion Doug Coby. … Coby also won the pole for the season-opening event and led 127 of 150 laps in the Icebreaker. … The Spring Sizzler is the first of four Whelen Modified Tour events at Stafford in 2015 and the second of nine Whelen Modified Tour events at state tracks this season. The division will return to Thompson three more times and make one stop at the New London-Waterford Speedbowl. … Sunday's event will mark the 115th for the Whelen Modified Tour at Stafford. … Bobby Santos III has won the last two Spring Sizzlers at Stafford. Ted Christopher is the only driver to win three consecutive Spring Sizzlers, from 2008-2010. … Christopher begins defense of his 2014 SK Modified division championship at Stafford in Sunday's 40-lap feature for that division. Christopher, the track's all-time winningest driver, is looking for his 10th championship in the division in 2015, though he will face much competition, such as Whelen Modified Tour regulars Ryan Preece, Justin Bonsignore, Woody Pitkat and Rowan Pennink, in addition to a host of other regular standouts. … Adam Gray is looking for his third consecutive Late Model division championship at Stafford in 2015. … Christopher is also scheduled to make his series debut in the 20-lap Mr. Rooter New England Truck Series feature on Saturday. … Stafford begins its regular weekly racing schedule May 1.